TypeXIII_burst_b is just a blank file to fill the gap in sound sequence, dunno why it was needed but JLS Sov also has to have such blank sound (no loop sound is needed while phaser fire is covered by fire sound) so it is meant to be mute.
Advcd_Quantum and ARquantum are used in game, the first one is used by that prototype torpedo (24 of them) and the latter is used by standard quantum that ship is fitted with.
the only sound that is not used ingame (due to too high quality, stereo with unsupported bitrate) is Prototype_torpedo.wav, I put it there just in case someone will need higher quality sound of it ;)